The study will include 20 patients who have an acute mid shaft diaphyseal humeral fracture due to injury. The patients will undergo lateral and AP X- ray evaluation of the fracture. Following General anesthesia, closed reduction of the fracture will be performed. It will be followed by nail insertion, percutaneously, according to standard surgical techniques, with the help of the insertion handle. Following insertion the nail will be locked both distally and proximally using interlocking screws. The nail and screws insertion will be monitored by fluoroscopy. Patients will remain under follow up for 6 months following the procedure. In the follow up sessions the fracture will be evaluated by fluoroscopy or X-ray for correct bone alignment, callus formation, and fracture union.